Landsend kids shoe size help

[Plump82]

If i was to buy these slippers inna size 5 does anyone know if the sizing of them are a size 5 or not? www.debenhams.com/webapp/wcs/stores/servlet/prod_10701_10001_61132+503176Z3N_-1 what does size 5 older mean?

Oh and should have said thanks!